All metals parameters. Hexavelent or trivalent metals and metals in ionic form (e.g., hexavalent chromium and aluminum, ion) are included, but metal compounds (e.g., calcium chloride) are not included. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies metals parameters and calculates the total metals load.

Search Considerations: The Loading Tool selects pollutant loadings for the Metals category if the loadings are associated with parameter codes in ICIS-NPDES that are on the metals list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.